Spell Duel

Build a deck of spells and battle a computer opponent. 40 cards, 3 opponents, and a deck builder.

by @promptarcadeCC BY 4.0

Will it work on my plan?

How we estimate

Claude

Top plans

ChatGPT

Top plans

Gemini

Top plans

Estimated from the size of the build, built in 3 stages. Plan names as of Oct 2026.

Made it better? Build it, change it with your AI, then share your remix. The original creator gets credit too.

Tags · cards · strategy · deck-builder

Make it yours

Tap your answers

Your AI gets one short, ready-to-go request.

Simplest picks first, and only the questions that matter most.

Setting

Computer opponent

Match length

Build with

Your promptspell-duel@v1

Build a turn-based card battler called "Spell Duel" as a single HTML file that runs in a phone or desktop browser.

Setting: Wizards.
Computer opponent: Tricky.
Match length: Standard (20 health).

Rules and features:
- Each player has health and an energy pool that grows by one each turn (max 10). Draw a card each turn, play cards by spending energy.
- 40 original cards: creatures with attack and health, instant spells, and a few with simple keywords (shield, swift, heal, draw).
- 3 computer opponents with their own decks and a clear AI (it plays sensible moves, not random ones).
- Deck builder: pick 20 cards from your collection; win matches to unlock new cards.
- Drag or tap to play cards and attack; clear animations for damage and card effects.

Your answers are already in. Free, always.

Next stages

When stage 1 works, send these in the same chat, one at a time.

Stage 2: all 40 cards, keywords, 3 opponents, deck builder and unlocks. Small edits to the existing file.

Stage 3: polish: card art from shapes and emoji, sound with mute, menus, save collection. Small edits to the existing file.

Made it better? Build it, change it with your AI, then share your remix. The original creator gets credit too.

Tags · cards · strategy · deck-builder